2006 Mazda MPV ESFACTORY OEM SERVICE PROCEDURE

Fuel Injector Operation Inspection

FUEL INJECTOR OPERATION INSPECTION CHART

STEP INSPECTION ACTION
1
  • While cranking engine, inspect for fuel injector operation sound at each cylinder using a soundscope.
  • Is operation sound heard?
 Yes Fuel injector operation is okay.
No All cylinders not heard: 
  • Go to next step.

Some cylinders not heard: 

  • Go to step 3.
2
  • Carry out main relay operation inspection.
  • Is main relay operation normal?
 Yes Inspect following:
  • Fuel injector power system related wiring harness and connectors.
  • PCM connectors.
  • Fuel injector GND and related wiring harness and connectors.
No Repair or replace malfunctioning part.
3
  • Switch fuel injector connectors of inoperative fuel injector and operating fuel injector.
  • Is operation sound heard?
 Yes Go to next step.
No Replace fuel injector.
4
  • Are wiring harness and connectors of inoperative fuel injector okay? (Open or short circuit.)
 Yes Inspect PCM terminal voltage of fuel injector signal.
No Repair or replace malfunctioning part.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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